What you're describing is something actually somewhat common and that I even seen in some therapy sessions before.
We can't quite choose our sexuality, what turns us on does it so automatically, usually tho, our life story can help explain the whys, sometimes genetics too, but they can't explain what we should do about it, people are left to fend for themselves.
So, somehow, you ended up as a feeder, but also, simultaneously, ended up hating the fact that you are this way. Of course that hating yourself for something that's out of your control is very hard, and is quite damaging, so the only escape is to turn that outwards to some random target.
I understand how you must feel, and it must be really painful, but the problem here is the inexplicable hatred towards your own sexuality, and not the fat people around you. By berating and attacking strangers you are not only crossing a line and insulting others, but in reality it will not fix anything because the base problem will stay there.
I would recommend you to try and talk to someone who's willing to listen and help explore and make sense of the topic with you. Like a psychologist, or some loved one that you're close with, if you want, you can DM me too.
1 year